Instructions

What should come in place of question mark (?) in the following question ?

Question 68

$$(98)^{45}\times(98)^{-35}=?$$

Solution

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By the rule of indices,

$$(a)^{b}\times(a)^{c}=(a)^{b+c}$$

$$(98)^{45}\times(98)^{-35}=(98)^{45-35}=(98)^{10}$$

Hence, the correct option is D.

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