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=[3/2(5)^3/2-1]/7/2×(5)^7/2 -1
=3/7× 5^1/2/5^5/2
=3/7×5^1/2-5/2
=3/7×5^-2
=3/7×1/25
=3/175.
limit. x^n-a^n)/x-a =n×a^n-1(here dividing num.
x .....,a
and denominator by x-5)
=3/7× 5^1/2/5^5/2
=3/7×5^1/2-5/2
=3/7×5^-2
=3/7×1/25
=3/175.
limit. x^n-a^n)/x-a =n×a^n-1(here dividing num.
x .....,a
and denominator by x-5)
jitu4823:
thanks
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