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Questions by nikhil
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The sum of first n natural numbers is given by the expression `n^2/2+n/2`. Factorise this
asked
Jan 17, 2022
in
8th-maths
marks3
chapter9
#sub
0
votes
0
answers
If `a^2 + b^2 = 74` and ab = 35, then find a +
asked
Jan 17, 2022
in
8th-maths
marks3
chapter9
#sub
0
votes
0
answers
Verify the following: `(a – b) (a – b) (a – b) = a^3 – 3a^2b + 3ab^2 –
asked
Jan 17, 2022
in
8th-maths
marks3
chapter9
#sub
0
votes
0
answers
The product of two expressions is `x^5 + x^3 + x`. If one of them is `x^2 + x+ 1`, find the
asked
Jan 17, 2022
in
8th-maths
marks3
chapter9
#sub
0
votes
0
answers
Match the expressions of column I with that of column II: Column I Column II (1) `(21x + 13y)^2` (a) `441x^2 – 169y^2` (2) `(21x – 13y)^2` (b) `441x^2 + 169y^2 + 546xy` (3) `(21x – 13y) (21x + 13y)` (c) `441x^2 + 169y^2 – 546xy` (d) `441x^2 – 169y^2 + 546xy`
asked
Jan 17, 2022
in
8th-maths
marks3
chapter9
#sub
0
votes
0
answers
Multiplicative inverse of `2^7`
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#mcq
0
votes
0
answers
`(-4)^4 xx(5/4)^4`
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#fib
0
votes
0
answers
Very small numbers can be expressed in standard form using positive
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#tnf
0
votes
0
answers
For a non-zero integer x, `(x^4)^(–3)` is equal
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#mcq
0
votes
0
answers
The standard form for 234000000
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#mcq
0
votes
0
answers
Cube of `-1/2`
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#mcq
0
votes
0
answers
50 =
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#fib
0
votes
0
answers
The usual form of `3.41 xx 10^6` is
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#fib
0
votes
0
answers
If `36 = 6 xx 6 = 62`, then `1/36` expressed as a power with the base 6 is
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#fib
0
votes
0
answers
The value of `[3^(–1) xx 4^(–1)]^2` is
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#fib
0
votes
0
answers
`24.58 = 2 xx 10 + 4 xx 1 + 5 xx 10 + 8 xx
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#tnf
0
votes
0
answers
The value of `(1/4)^(-2)` is equal to
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#tnf
0
votes
0
answers
`a^m =
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#tnf
0
votes
0
answers
The usual form for `2 xx 10^(–2)` is not equal to
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#tnf
0
votes
0
answers
Large numbers can be expressed in the standard form by using positive
asked
Jan 17, 2022
in
8th-maths
marks1
chapter8
#tnf
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