Q. b(n)=4−6(n−1)Find the 4th term in the sequence.
Understand sequence formula: Understand the sequence formula.The given sequence is defined by the formula b(n)=4−6(n−1). This is an arithmetic sequence where the first term is 4 and the common difference is −6.
Plug in value for 4th term: Plug in the value of n to find the 4th term.To find the 4th term, we substitute n=4 into the formula: b(4)=4−6(4−1).
Perform calculation in parentheses: Perform the calculation inside the parentheses.Calculate the expression within the parentheses: 4−1=3.
Multiply by −6: Multiply the result by −6.Now multiply −6 by the result from the previous step: −6×3=−18.
Subtract from 4: Subtract the result from 4.Finally, subtract −18 from 4 to find the 4th term: 4−(−18)=4+18=22.