Please help me in these 2 questions ASAP! Thanks a lot!

see explanation

Step-by-step explanation:

12

The explicit formula for a geometric sequence is

= a₁

where a₁ is the first term and r the common ratio

Here a₁ = - 1 and r = = = 5 , then

= -

13

Using the explicit formula for a geometric sequence

= a₁

where a₁ is the first term and r the common ratio

Here a₁ = - 48 and r = = = - 2 , then

a₁₀ = - 48 × = - 48 × - 512 = 24576

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step-by-step explanation: