Question

3. How many terms of the A. P. 16, 14, 12,... are needed to give the sum 60? Explain

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Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

Sn=2a+n-1d

60=2(16)+(n-1 )2

60=32+(n-1)2

60-32=n-1

28÷2=n-1

14=n-1

14+1=n

n=15