Clear definition of xylem
Answers
Explanation:
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┴┬┴┬┴┬┴ \___\ ﹨____\If the common difference of an A.P. is 3, then find a20 – a15.If the common difference of an A.P. is 3, then find a20 – a15.If the common difference of an A.P. is 3, then find a20 – a15.Given: d=3
We know:
an=a+(n−1)d
∴a20−a15=[a+19d]−[a+14d]
=5d
=5×3
=15
Hence, the answer is 15.